If and , then…

MATHEMATICS · Single correct · A Level · Mathematics · Trigonometry · Trigonometry

Problem

\tan\theta+\sin\theta=m

and

\tan\theta-\sin\theta=n

, then

(m^2-n^2)^2

is (1)

4\sqrt{mn}

(2)

4mn

(3)

16\sqrt{mn}

(4)

16mn